noun
W chromosome
A sex chromosome found in some animals (e.g., birds, butterflies) where females are the heterogametic sex (ZW).
鳥類では、メスがＷ染色体とＺ染色体を持ち、オスはＺ染色体を二つ持つ。
In birds, females have a W chromosome and a Z chromosome, while males have two Z chromosomes.
General term for sex chromosomes; W chromosome is a specific type.
From English 'W chromosome', where 'W' is a letter designation for this type of sex chromosome.